Graphic user interface for a portion of a display screen



The FIGURE is a graphic user interface for a front view of a portion of a display screen showing our new design.

The broken line showing of various regions and the unshaded areas there within form no part of the claimed design. The broken line showing a portion of a display screen is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a graphic user interface for a portion of a display screen, as shown and described. 